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orion-rf.piolibdepsesp32-s3-n16r8U8g2srcclibu8x8_input_value.c

123 lines · 3.5 KB · C

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1/*
2
3 u8x8_input_value.c
4
5 Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/)
6
7 Copyright (c) 2016, olikraus@gmail.com
8 All rights reserved.
9
10 Redistribution and use in source and binary forms, with or without modification,
11 are permitted provided that the following conditions are met:
12
13 * Redistributions of source code must retain the above copyright notice, this list
14 of conditions and the following disclaimer.
15
16 * Redistributions in binary form must reproduce the above copyright notice, this
17 list of conditions and the following disclaimer in the documentation and/or other
18 materials provided with the distribution.
19
20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
21 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
22 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
25 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
29 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
30 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33
34*/
35
36#include "u8x8.h"
37
38/*
39 return:
40 0: value is not changed (HOME/Break Button pressed)
41 1: value has been updated
42*/
43
44uint8_t u8x8_UserInterfaceInputValue(u8x8_t *u8x8, const char *title, const char *pre, uint8_t *value, uint8_t lo, uint8_t hi, uint8_t digits, const char *post)
45{
46 uint8_t height;
47 uint8_t y;
48 uint8_t width;
49 uint8_t x;
50 uint8_t local_value = *value;
51 uint8_t r;
52 uint8_t event;
53
54 /* calculate overall height of the input value box */
55 height = 1; /* button line */
56 height += u8x8_GetStringLineCnt(title);
57
58 /* calculate offset from top */
59 y = 0;
60 if ( height < u8x8_GetRows(u8x8) )
61 {
62 y = u8x8_GetRows(u8x8);
63 y -= height;
64 y /= 2;
65 }
66
67 /* calculate offset from left for the label */
68 x = 0;
69 width = u8x8_GetUTF8Len(u8x8, pre);
70 width += digits;
71 width += u8x8_GetUTF8Len(u8x8, post);
72 if ( width < u8x8_GetCols(u8x8) )
73 {
74 x = u8x8_GetCols(u8x8);
75 x -= width;
76 x /= 2;
77 }
78
79 /* render */
80 u8x8_ClearDisplay(u8x8); /* required, because not everything is filled */
81 u8x8_SetInverseFont(u8x8, 0);
82 y += u8x8_DrawUTF8Lines(u8x8, 0, y, u8x8_GetCols(u8x8), title);
83 x += u8x8_DrawUTF8(u8x8, x, y, pre);
84 u8x8_DrawUTF8(u8x8, x+digits, y, post);
85 u8x8_SetInverseFont(u8x8, 1);
86
87 /* event loop */
88 u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits));
89 for(;;)
90 {
91 event = u8x8_GetMenuEvent(u8x8);
92 if ( event == U8X8_MSG_GPIO_MENU_SELECT )
93 {
94 *value = local_value;
95 r = 1;
96 break;
97 }
98 else if ( event == U8X8_MSG_GPIO_MENU_HOME )
99 {
100 r = 0;
101 break;
102 }
103 else if ( event == U8X8_MSG_GPIO_MENU_NEXT || event == U8X8_MSG_GPIO_MENU_UP )
104 {
105 if ( local_value >= hi )
106 local_value = lo;
107 else
108 local_value++;
109 u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits));
110 }
111 else if ( event == U8X8_MSG_GPIO_MENU_PREV || event == U8X8_MSG_GPIO_MENU_DOWN )
112 {
113 if ( local_value <= lo )
114 local_value = hi;
115 else
116 local_value--;
117 u8x8_DrawUTF8(u8x8, x, y, u8x8_u8toa(local_value, digits));
118 }
119 }
120
121 u8x8_SetInverseFont(u8x8, 0);
122 return r;
123}